The series features a Texas family. Book 1: Melissa Gregory is a widow and not looking for a man. Thanks to her mysterious father who is financing the last two years of her daughter's college, Melissa is back in college focused on finishing her own degree. Jason Davis, a former Marine, introduces himself the first day of their statistics class. He's facing a family challenge that scares him more than anything he experienced in the Marines. Book 2: Ashley is happy to be single. She is in control until she meets handsome medical student Mark Barrow in an emergency on a subway train. He is focused on his career and haunted by the death of his lover and soulmate. Book 3: Patricia Donaldson is no stranger to the ups and downs of love, but she finds herself taking an unexpected second ride of love on life's zip line with a most unlikely man. Is it a fling or is it more? The series exemplifies the analogy: love on life's zip line is the messiest and most complicated of all, but it is oh so worth it.